posted 08-31-2026 10:08 AM               

ISS Expedition 75: U.S. Spacewalk 99

Two Expedition 75 flight engineers will perform a six-and-a-half-hour spacewalk outside the International Space Station on Tuesday, Sept. 1, 2026.

NASA astronaut Jessica Meir and ESA (European Space Agency) astronaut Sophie Adenot will replace a retroreflector on the forward port of the space station's Harmony module to support spacecraft navigation during rendezvous and docking operations.

They are also tasked with installing jumper cables for the data-relay systems, preparing the Alpha Magnetic Spectrometer's radiator for future maintenance and replacing a high-definition camera on the station's truss.

Adenot will serve as spacewalk crew member 1 and will wear a suit with red stripes. Meir will serve as crew member 2 and will wear an unmarked suit.

This will be Meir's seventh spacewalk and Adenot's third. Meir will move into third all-time for total spacewalks among women at NASA, trailing Peggy Whitson (10) and Suni Williams (9). The excursion also marks the 284th spacewalk supporting the International Space Station's assembly, maintenance, and upgrades.

posted 09-01-2026 12:07 AM               

NASA astronaut Jessica Meir and ESA (European Space Agency) flight engineer Sophie Adenot will begin a spacewalk at around 8:30 a.m. EDT (1230 UTC) on Tuesday, Sept. 1.

posted 09-01-2026 03:54 PM               

Astronauts replace HD camera and docking aid

NASA astronaut Jessica Meir and ESA (European Space Agency) astronaut Sophie Adenot got through most of the tasks set out for them even in light of Adenot's spacesuit developing a mobility issue late in the 6 hours and 49 minute extravehicular activity (EVA).

After beginning the spacewalk from the U.S. Quest airlock at 8:40 a.m. EDT (1240 GMT), Meir and Adenot set about the first and most important activity of the outing, replacing the planar deflector on the forward port of the station's Harmony Node 2. The retroreflector is used to support navigation during rendezvous and docking operations by visiting spacecraft.

The older reflector that they replaced had become coated in thruster residue from earlier spacecraft arrivals and departures.

They also replaced the Camera Port 3 (CP3) high-definition (HD) camera on the station's truss.

From there, Adenot headed off to continue an ongoing scientific study by swabbing areas on the exterior of the airlock and her gloves for possible microorganisms. Meir, meanwhile, rode one end of the Canadarm II robotic arm to a site near the Alpha Magnetic Spectrometer (AMS), torquing 46 bolts in preparation of future maintenance of the particle physics detector.

Meir also relocated jumper cables and an articulating portable foot restraint for use on a later spacewalk.

There were some other tasks planned, time permitting, but towards the end of the EVA, Adenot reported losing mobility in her left shoulder joint. Erring on the side of caution, Mission Control called for Adenot to wait where she was until Meir could follow her back to the airlock.

Once there, Meir was able to unzip a portion of Adenot's extravehicular mobility unit's (EMU's) upper arm assembly to inspect what was happening. In doing so, she freed the kink that had limited Adenot's motion.

The two Expedition 75 crewmates then proceeded back into the airlock to complete the EVA at 3:29 p.m. EDT (1929 GMT).

Tuesday's spacewalk was Meir's seventh spacewalk and Adenot's third. Meir, who has a total of 49 hours and 22 minutes on EVA, now ranks third among all women astronauts at NASA for the total number of spacewalks. She trails only Peggy Whitson with 10 and Suni Williams at 9.

Adenot now has spent 19 hours and 42 minutes working in the vacuum of space.

This spacewalk also marks the 284th supporting the International Space Station's assembly, maintenance, and upgrades. It was the seventh spacewalk this year, fifth EVA for Expedition 75 and the sixth all-female spacewalk in history.